How long do wasp alarm pheromones last?
Three days ago I was walking at a creek trail near my house and got stung on my leg by what I'm pretty sure was a yellowjacket (didn't get a good look). Then today I was finally brave enough to walk there again and got stung again on my leg about five inches away from the first sting. I was stung while walking in the same general area, so I figure there's a nest around there, and they're getting cranky cause it's fall, but is that the only reason why I got stung again? It's so near the first sting. And I've been walking at that trail practically every day for like a decade and I'd never been stung there until now.